Catalyst and metal ferrites for reduction of hydrogen sulfide emissions from automobile exhaust
US4916105A · kind A · utility
23Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1989 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Feb 7, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/524
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst, which is capable of controlling not only HC, CO and NO.sub.x, but also H.sub.2 S emission from the tail pipe of catalytic converter automobiles, is made of platinum-group metals promoted by rare earth oxides and containing a metal ferrite. The ferrite is present in an H.sub.2 S gettering amount and in an amount up to about 20 weight % of the catalyst. The catalyst comprises an alumina support and is applied as a washcoat to a substrate, such as a honeycomb monolith made from ceramic or metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.